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$\begingroup$Connected to IQ measurement, or connected to IQ? Connected to IQ: processing speed, neural networking density etc. relate to what the brain can or cannot do. How should the brain not be related to intelligence? The general factor is the brain's basic potency.$\endgroup$
– user3116Sep 8 '13 at 18:00

$\begingroup$i mean absolutely what you mentioned. biology to IQ to IQ measurement. I know that there are several concepts IQ from Spearman to Guilford to Gardner, but I am interested if there are any research which will connect spearman works to biology. if there are some other research related to guilford or gardner i will also like to read that.$\endgroup$
– ICanFeelItSep 8 '13 at 19:47

$\begingroup$also i think there are some reserch where IQ was measured directly by EEG, not by paper and pencil$\endgroup$
– ICanFeelItSep 8 '13 at 19:51

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$\begingroup$imo, intelligence is an ill-defined term. I think it would take volumes to answer the question as is. Narrowing it down might be productive.$\endgroup$
– Keegan KeplingerSep 9 '13 at 3:14